• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1457407 Automatic control of speed RCA CORPORATION 19 March 1974 [20 March 1973] 13265/73 Heading G3R A speed-control system for video disc playback apparatus uses (i) a "low frequency" speed correction system 15 maintaining the average speed (as defined below) between the disc and a pick-up stylus 12 at a pre-set value and (ii) a "high frequency" speed correction system 20 that varies the position of the stylus with respect to the disc so as to maintain the instantaneous relative speed between them at the pre-set value. Signals in the pick-up playback signal are used to delay the operation of system 20 relative to the initiation of system 15. The average velocity is said to be the speed with high frequency errors averaged out. As shown, system 15 comprises a motor 13 tending to drive the disc overspeed and a brake 17, to control the disc speed to the pre-set value and energized according to the error between the average frequency of horizontal sync. signals in the playback signal and a desired frequency. After switching on, and to allow for initial positioning of the pick-up, system 15 is not energized until the first vertical sync. signal is received following a time delay corresponding to four horizontal sync. signals. After a further delay during which system 15 stabilizes the average disc speed; the system 20 is energized to afford control of the instantaneous disc speed. Details of the sync. separating circuit 21, and the circuit 76, that switches on the speedcontrol systems 15, 20 are given in Fig. 2 and 3 respectively (not shown). The pick-up 12 may capacitively sense a spiral groove on the disc.
    公开号:SU753369A3
    申请号:SU742010612
    申请日:1974-03-19
    公开日:1980-07-30
    发明作者:Д. Болтз Чарльз
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    an electrically conductive material and placed in the spiral groove of the video plate 2, the change in the relief of which contains information about the recorded video signal. Video plate 2 is made with a dielectric coating placed by a meled of its metal layer and a reproducing needle 1. Video plate 2 is mounted on a rotating disk 3 connected via a belt 4 to an electric motor 5.
    The reproducing needle 1 is connected via a transducer video generator 6 to an output bus 7 connected to a television receiver and to a selector of 8 sync pulses. The latter is equipped with an output of 9 frame sync pulses and an output of 10 horizontal sync pulses connected via a driver AND of a signal for deviating the average speed of rotation of disk 3 to node 12 of braking disk 3.
    The device also contains a shaper 13 of the instantaneous rotational speed of the disk 3, connected between the output of 10 horizontal sync pulses and the node 14 and the displacement of the reproducing needle 1. The output of 9 frame sync pulses of the selector 8 of sync pulses is connected to the capacitor 16, the resistor 17 and the first threshold element 18. The latter is connected to capacitor 19, resistor 20, shaper 11 of the deviation signal of the average rotational speed of the disk 3 and to the second threshold element 21. The latter is connected through a key 22 with a reproducing needle moving unit 14 1.
    In the proposed device, the control of the average speed of rotation of the disk 3 is produced by adjusting the braking of the latter by means of the braking unit 12. Vibration reduction
    four
    the speed of rotation of the disk 3 near its midpoint is accomplished by adjusting the position of the reproducing needle 1 through the movement unit 14.
    The use of the invention makes it possible to significantly reduce the error in controlling the movement of a video plate relative to a reproducing needle and provides a fairly simple design of the device for controlling movement of a video plate relative to a reproducing needle.
    权利要求:
    Claims (2)
    [1]
    1. US patent number 3622163, cl. 274-13, publ. 1971.
    [2]
    2. US patent number 3711641, cl. 178-6.6, ord. 01/16/73 (prototype). -
    类似技术:
    公开号 | 公开日 | 专利标题
    EP0011495B2|1989-07-12|Method and apparatus for rotating an information storage disc
    GB2062905A|1981-05-28|Disc record reproducing apparatuses
    US4562570A|1985-12-31|Video disc turntable having clamping device
    SU753369A3|1980-07-30|Device for video record motion control with respect to reproducing needle
    CA1180112A|1984-12-27|Reproducing apparatus
    US4403259A|1983-09-06|Apparatus for reading information from an information recording disc
    US4680746A|1987-07-14|Recording disc rotary drive control apparatus
    JPS6273885A|1987-04-04|Special reproducing device for video tape recorder
    GB2104703A|1983-03-09|Video recording and reproducing apparatus
    GB1331759A|1973-09-26|Running-speed control system for magnetic recording medium
    US4005260A|1977-01-25|Device for reading a disk-shaped record carrier with time base correction
    US4763205A|1988-08-09|Method of time axis control in an information recording system for compensation of tracking error caused by track jumping
    JPH0731872B2|1995-04-10|Time axis control system
    US3542949A|1970-11-24|Electronic editing device for a magnetic recording and reproducing apparatus
    JPS56158581A|1981-12-07|Recording and playback system for rotating recording medium
    CA1250047A|1989-02-14|Reproduced signal switching circuit for reproducingapparatus having rotary heads for specialreproduction
    PL116686B1|1981-06-30|Disc speed control and adjustment system
    GB2133587A|1984-07-25|Magnetic reproducing apparatus having a capstan servo circuit
    GB1035867A|1966-07-13|Improvements in or relating to control systems
    JPS58122638A|1983-07-21|Magnetic recorder and reproducer
    US3318998A|1967-05-09|Phase stable servo system for magnetic tape recording and reproducing device
    JPS5625264A|1981-03-11|Rotation contrl system for driving motor of recorder for equal line speed information recording medium disk
    US4323998A|1982-04-06|Video disc locked groove corrector
    KR830000223B1|1983-02-23|System for Recording Signals on Disk Models
    US4278846A|1981-07-14|Video disc locked groove clearance system
    同族专利:
    公开号 | 公开日
    DE2413496B2|1976-06-16|
    JPS5027424A|1975-03-20|
    AU6659574A|1975-09-18|
    DK139285B|1979-01-22|
    FI60460C|1982-01-11|
    FI60460B|1981-09-30|
    ATA232374A|1979-05-15|
    NL7403356A|1974-09-24|
    BR7402108D0|1974-11-19|
    FR2222723A1|1974-10-18|
    JPS5422369B2|1979-08-06|
    US3873764A|1975-03-25|
    DE2413496A1|1974-10-03|
    CA1024257A|1978-01-10|
    IT1010701B|1977-01-20|
    SE396152B|1977-09-05|
    GB1457407A|1976-12-01|
    DK139285C|1979-06-25|
    FR2222723B1|1977-10-07|
    AT354120B|1979-12-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3530258A|1968-06-28|1970-09-22|Mca Technology Inc|Video signal transducer having servo controlled flexible fiber optic track centering|
    JPS4925046B1|1970-02-20|1974-06-27|
    US3711641A|1971-03-22|1973-01-16|Rca Corp|Velocity adjusting system|
    DE2124923A1|1971-05-19|1972-12-07|Bosch Fernsehanlagen|Method and device for synchronizing a television signal recorded on tape by means of a head wheel|US4005260A|1972-11-11|1977-01-25|U.S. Philips Corporation|Device for reading a disk-shaped record carrier with time base correction|
    JPS50154014A|1974-06-01|1975-12-11|
    NL7412154A|1974-09-13|1976-03-16|Philips Nv|DEVICE FOR READING DISK-SHAPED INFORMATION CARRIERS.|
    JPS5230109U|1975-08-25|1977-03-02|
    US4286282A|1979-08-20|1981-08-25|Rca Corporation|Periodically biased video disc player servo system|
    FR2489063B1|1980-08-22|1986-09-26|Victor Company Of Japan|TRAVEL COMPENSATION DEVICE IN A ROTARY RECORDING MEDIUM REPRODUCING APPARATUS|
    JPS5850673A|1981-09-18|1983-03-25|Hitachi Ltd|Pickup device|
    JPH0613868U|1992-07-24|1994-02-22|龍哉 佐治|Closed space throwing toys|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB1326573A|GB1457407A|1973-03-20|1973-03-20|Playback apparatus with speed correctionsystem|
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